Microstructure and corrosion resistance of Ni-Cu alloy fabricated through wire arc additive manufacturing

被引：36

作者：

Kannan, A. Rajesh ^{[1
]}

Kumar, S. Mohan ^{[2
]}

Pramod, R. ^{[1
]}

Shanmugam, N. Siva ^{[1
]}

Vishnukumar, M. ^{[3
]}

Channabasavanna, S. G. ^{[4
]}

机构：

[1] Natl Inst Technol, Dept Mech Engn, Tiruchirappalli 620015, Tamil Nadu, India

[2] Chennai Inst Technol, Ctr Addit Mfg, Chennai 600069, Tamil Nadu, India

[3] Natl Inst Technol, Dept Met & Mat Engn, Tiruchirappalli 620015, Tamil Nadu, India

[4] JSS Sci & Technol Univ, Sri Jayachamarajendra Coll Engn, Dept Mech Engn, Mysuru 570006, Karnataka, India

来源：

MATERIALS LETTERS | 2022年 / 308卷

关键词：

Wire arc additive manufacturing; Ni-Cu alloy; Welding; Microstructure; Corrosion;

D O I：

10.1016/j.matlet.2021.131262

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Wire arc additive manufacturing (WAAM) technology is a promising low-cost process for fabricating or restoring marine structures with Ni-Cu alloy. In this work, single pass multi-layer wall of Monel FM60 was deposited with WAAM process. The micrographs revealed the presence of equiaxed and elongated columnar dendrites with minor amount of Cu segregation in Ni-Cu matrix. Due to the complex cyclic thermal history, the microstructure varied along the building direction (BD) and the secondary dendrite arm spacing (SDAS) ranged between 5 and 15 mu m. Energy Dispersive X-Ray Analysis (EDS) results confirmed the existence of tiny Ti-rich particles within the Ni-Cu matrix. The WAAM processed Monel FM60 specimens (0.40-0.62 mpy) exhibited better corrosion resistance compared to traditional Monel 400 alloy (0.57-0.67 mpy) in 3.5% NaCl solution. The enhanced corrosion resistance is corroborated to the retaining of strengthening elements in WAAM specimens and the pit size ranged between 40 and 80 mu m.

引用

页数：4

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